7个造林树种对重金属污染的吸滞能力评价试验

Comparison test of seven trees species in resistance to heavy metals pollution

通过杞柳、水杨梅等7个造林树种的造林试验,测定了各树种1年生根部组织内Hg、Cd、Ni、Cr、Cu、Mn、Zn、Pb和As等9种重金属指标的含量。测定结果显示:7个树种对重金属均有一定的吸滞能力,其中杞柳对所有测定的重金属均有较强的吸滞能力,其他树种对不同重金属指标吸滞能力表现不一。通过综合吸滞能力评价,按CI值将7个树种的综合吸滞能力种排序:杞柳>池杉>垂柳>落羽杉>湿地松>水杨梅>杨树。

In this paper,silvicultural test with Salix integra Thunb,Adina rubella Hance,Salix babylonica L.,Populus sp.,Taxodium distichum,Pinus elliottii and Taxodium ascendens Brongn was conducted in Taihu area,to examine the contents of Hg,Cd,Ni,Cr,Cu,Mn,Zn,Pb and As in annual root.The results showed that seven species had a certain ability to absorb heavy metals.The absorptive capacity of Salix integra Thunb was stronger to each heavy metal.Absorptive capacity of other species to the different heavy metals was different.Through comprehensive evaluation of the absorption capacity,according to CI value of 7 tree species sorted as follows：Salix integra ThunbTaxodium ascendens BrongnSalix babylonica L.Taxodium distichumPinus elliottii Adina rubella Hance Populus sp..